package com.lottery.im.module.tim.utils;

import android.media.MediaRecorder;
import android.util.Log;
import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;

/**
 * 录音工具
 */
public class RecorderUtil {

  private static final String TAG = "RecorderUtil";

  private String mFileName = null;
  private MediaRecorder mRecorder = null;
  private long startTime;
  private long timeInterval;
  private boolean isRecording;

  public RecorderUtil() {
    mFileName = TimFileUtil.getCacheFilePath("tempAudio");
  }

  /**
   * 开始录音
   */
  public void startRecording() {
    if (mFileName == null) return;
    if (isRecording) {
      mRecorder.release();
      mRecorder = null;
    }
    mRecorder = new MediaRecorder();
    mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    mRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
    mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);

    mRecorder.setOutputFile(mFileName);
    startTime = System.currentTimeMillis();
    try {
      mRecorder.prepare();
      mRecorder.start();
      isRecording = true;
    } catch (Exception e) {
      Log.e(TAG, "prepare() failed");
    }
  }

  /**
   * 停止录音
   */
  public void stopRecording() {
    if (mFileName == null) return;
    timeInterval = System.currentTimeMillis() - startTime;
    try {
      if (timeInterval > 1000) {
        mRecorder.stop();
      }
      mRecorder.release();
      mRecorder = null;
      isRecording = false;
    } catch (Exception e) {
      Log.e(TAG, "release() failed");
    }
  }

  /**
   * 获取录音文件
   */
  public byte[] getDate() {
    if (mFileName == null) return null;
    try {
      return readFile(new File(mFileName));
    } catch (IOException e) {
      Log.e(TAG, "read file error" + e);
      return null;
    }
  }

  /**
   * 获取录音文件地址
   */
  public String getFilePath() {
    return mFileName;
  }

  /**
   * 获取录音时长,单位秒
   */
  public long getTimeInterval() {
    return timeInterval / 1000;
  }

  /**
   * 将文件转化为byte[]
   *
   * @param file 输入文件
   */
  private static byte[] readFile(File file) throws IOException {
    // Open file
    RandomAccessFile f = new RandomAccessFile(file, "r");
    try {
      // Get and check length
      long longlength = f.length();
      int length = (int) longlength;
      if (length != longlength) {
        throw new IOException("File size >= 2 GB");
      }
      // Read file and return data
      byte[] data = new byte[length];
      f.readFully(data);
      return data;
    } finally {
      f.close();
    }
  }
}
